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Now Foods, L-Tryptophan Powder, 2 oz (57 g)

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Now Foods, L-Tryptophan Powder, 2 oz (57 g)

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Now Foods, L-Tryptophan Powder, 2 oz (57 g)

In Stock
  • Expiration Date: 12/2018
  • Shipping Weight:
    0.24 lbs
    Switch to Metric units
  • Product Code: NOW-00263
  • UPC Code: 733739002631
  • Package Quantity: 2 oz
  • Dimensions:
    2.3 x 2.3 x 4.3 in, 0.2 lbs
    Switch to Metric units
Frequently Purchased Together
Product Overview


  • Supports Relaxation
  • Encourages Positive Mood
  • Promotes Restful Sleep
  • Non-GMO
  • A Dietary Supplement
  • Vegetarian - Vegan
  • Amino Acids
  • Family Owned Since 1968
  • GMP Quality Assured

L-Tryptophan is an essential amino acid; therefore, it is not synthesized by the body and must be obtained from the diet. L-Tryptophan is critical for the production of serotonin and melatonin, which help to support a positive mood, healthy sleep patterns, and proper immune system function. Every lot of NOW L-Tryptophan is tested to be free of Peak E and microbial contamination.

Suggested Use

Take one or two 1/4 level teaspoons 2 to 3 times daily on an empty stomach, with final dose at bedtime, or as directed by your physician.

Other Ingredients


Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.


Caution: For adults only. Consult physician if pregnant/nursing, taking medication (especially antidepressants such as SSRIs and MAOIs), or have a medical condition. May cause drowsiness. Do not use with alcoholic beverages or while operating heavy machinery. Keep out of reach of children.

Do not eat freshness packet enclosed.

This product is sold by weight not volume.

Store in a cool, dry place after opening.

Supplement Facts
Serving Size: 1/4 Level Teaspoons (approx. 1 g)
Servings Per Container: about 57
  Amount Per Serving %Daily Value
L-Tryptophan (Free-Form) 950 mg *
* Daily Value not established.
iHerb Customer Reviews

Only need a little bit!

Posted by iHerb Customer on Feb 17, 2018 | Verified Purchase

For me, I can't take the recommended amount because it's too much. So, I've cut it down to half the two recommended daily doses.

Thanks for your feedback!

Helps to get to sleep

Posted by iHerb Customer on Dec 10, 2017 | Verified Purchase

Though L Tryptophan does not keep me asleep - it helps me get to sleep - along with counting backwards from 100 which keeps me from thinking about things as that will fight the sleep. :)

Thanks for your feedback!

It works

Posted by iHerb Customer on Dec 03, 2017 | Verified Purchase

My pup has epilepsy and L-Tryptophan helps to resolve this issue, price is reasonable and it works well, my pup doesn't has epilepsy since he is having it, unless stopped for 4 days epilepsy comes back, so pls try not to be OOS.

Thanks for your feedback!


Posted by iHerb Customer on Aug 18, 2017 | Verified Purchase

Tastes terrible, but works like a charm!

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Ended depression

Posted by iHerb Customer on Jul 14, 2017 | Verified Purchase

I immediately start feeling the positive effects after I take this. It's a keeper. I started taking it for PTSD and depression. It pulled me out of my depression within the first one or two weeks! I regained a lot of my energy, started sleeping better and my emotions slowly started working again. I no longer consider myself depressed, and neither does my therapist. I do have to keep taking it, but am ok if I miss several days at a time now. It helps a little with the anxiety, but still very much suffer from PTSD. It unexpectedly also helped my period, which had been excruciating since I was a teenager, but all normal now. I had tried so many things before which didn't work and I didn't even take this one for this purpose :p It also helps with some of my back pain.

Thanks for your feedback!